// (function () {
//   var html = document.documentElement;
//   var width = html.getBoundingClientRect().width;
//   html.style.fontSize = width / 10 + 'px'; //至于除数15可自行设置
//   //1rem=50;
// })()

(function (doc, win) {
  var docEl = win.document.documentElement;
  var resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize';

  var refreshRem = function () {
    var clientWidth = win.innerWidth ||
      doc.documentElement.clientWidth ||
      doc.body.clientWidth;

    console.log(clientWidth)
    if (!clientWidth) return;
    var fz;
    var width = clientWidth;
    fz = 16 * width / 375;
    docEl.style.fontSize = fz + 'px'; //这样每一份也是16px,即1rem=16px
  };

  if (!doc.addEventListener) return;
  win.addEventListener(resizeEvt, refreshRem, false);
  doc.addEventListener('DOMContentLoaded', refreshRem, false);
  refreshRem();

})(document, window);